How about some internet or webmastry jokes to lighten things up a bit.

Why do computer scientists/electronic circuit engineers always confuse Halloween and Christmas?
Because 31 Oct = 25 Dec.

Haiku Error Messages-

The Web site you seek
cannot be located but
countless others exist

Three things are certain:
Death, taxes, and lost data.
Guess which has occurred.

The code was willing,
It considered your request,
But the chips were weak.

Server's poor response
Not quick enough for browser.
Timed out, plum blossom.

Santa Claus is Coming To Town - for UNIX geeks.

better !pout !cry
better watchout
lpr why
santa claus town

cat /etc/passwd >list
ncheck list
ncheck list
cat list | grep naughty >nogiftlist
cat list | grep nice >giftlist
santa claus town

who | grep sleeping
who | grep awake
who | grep bad || good
for (goodness sake) {
be good
}